# SIGTERM, SIGSEGV, SIGINT, SIGILL, SIGABRT, SIGFPE

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< c‎ | program

Defined in header ``<signal.h>`` |  |
#define SIGTERM /*implementation defined*/ |  |
#define SIGSEGV /*implementation defined*/ |  |
#define SIGINT /*implementation defined*/ |  |
#define SIGILL /*implementation defined*/ |  |
#define SIGABRT /*implementation defined*/ |  |
#define SIGFPE /*implementation defined*/ |  |

Each of the above macro constants expands to an integer constant expression with distinct values, which represent different signals sent to the program.

Constant | Explanation
`SIGTERM` | termination request, sent to the program
`SIGSEGV` | invalid memory access (segmentation fault)
`SIGINT` | external interrupt, usually initiated by the user
`SIGILL` | invalid program image, such as invalid instruction
`SIGABRT` | abnormal termination condition, as is e.g. initiated by abort()
`SIGFPE` | erroneous arithmetic operation such as divide by zero

### References

- C17 standard (ISO/IEC 9899:2018):

  - 7.14/3 Signal handling <signal.h> (p: 193)

- C11 standard (ISO/IEC 9899:2011):

  - 7.14/3 Signal handling <signal.h> (p: 265)

- C99 standard (ISO/IEC 9899:1999):

  - 7.14/3 Signal handling <signal.h> (p: 246)

- C89/C90 standard (ISO/IEC 9899:1990):

  - 4.7 SIGNAL HANDLING <signal.h>

### See also

signal | sets a signal handler for particular signal (function)
raise | runs the signal handler for particular signal (function)
C++ documentation for signal types

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